My Product Is Time

In the era of cataclysm, ferocious beasts are rampant, and everyone is eager to awaken. Deep in the ruins, I opened an inconspicuous shop. "Shopkeeper, I want the power of revenge!" The boy with a broken arm begged on his knees. "Yes," I pushed the contract, "in exchange for the light of the rest of your life." He signed and returned three days later with the enemy's head, but he died among the beasts due to blindness. Later, some people exchanged their sister's luck for power, some exchanged their memory of loyalty for breakthrough, and some wanted to exchange the fear of millions of people for the throne... I accept everything according to the order, no matter how young or old I am. Until the strongest martial god knelt in front of the door, willing to exchange the admiration of all mankind for the power of killing gods with one blow. I laughed. He doesn't understand—— What this shop charges is not price, but humanity. And the lamp that was about to go out on the counter was burning my own soul. "The last item today: ownership of our store. The price is——" I looked at the mountain of corpses and sea of blood outside the door, and the blind boy holding his sister's body. "Your hatred and my life."